condition mean min max ZT0-3 0.03926223333333333 0.033151466666666664 0.045373 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.032470149999999996 0.0 0.06494029999999999 ZT16-19 0.038932 0.038932 0.038932 ZT20-23 0.099113 0.099113 0.099113